Blender has an option that if you disable "Overwrite" in Rendering settings. It'll check if a frame exists on disk, before starting rendering it.
This is very helpful if rendering crashed and I'm left with a pool of PNG or EXR files that might follow an order, but might not. Manually checking which frames rendered and which didn't and manually setting Write node's frame ranges to fill in the gaps would be quite tedious.
Also if I have to kill rendering because (for example) I have other processes running, and I need to free memory or I'm in trouble - will again cause me to re-render frames that are perfectly fine - wasting resources, or will require me to manually check what rendered and do the tedious patching work.
Is there a function in Natron that helps with that?
I couldn't find anything.